RDOCategories object

RDOCategories collection represents
categories from a given store or local machine (depending on the Outlook version
and whether the collection is retrieved from the
RDOSession or RDOStore2 object).

When accessed though
RDOSession.Categories, RDOCategories
collection first attempts to read the category list from the default store in
the profiles (where Outlook 2007 stores it). If no categories are present in the
default store, Redemption tries to read the categories list from the registry if
Outlook 2003 or older is installed.

When accessed though
RDOStore2.Categories, RDOCategories
only reads the list from the store.